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comparison: dom/smil/nsSMILValue.cpp
dom/smil/nsSMILValue.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:fac31c40e4ce |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "nsSMILValue.h" | |
| 7 #include "nsDebug.h" | |
| 8 #include <string.h> | |
| 9 | |
| 10 //---------------------------------------------------------------------- | |
| 11 // Public methods | |
| 12 | |
| 13 nsSMILValue::nsSMILValue(const nsISMILType* aType) | |
| 14 : mType(nsSMILNullType::Singleton()) | |
| 15 { | |
| 16 if (!aType) { | |
| 17 NS_ERROR("Trying to construct nsSMILValue with null mType pointer"); | |
| 18 return; | |
| 19 } | |
| 20 | |
| 21 InitAndCheckPostcondition(aType); | |
| 22 } | |
| 23 | |
| 24 nsSMILValue::nsSMILValue(const nsSMILValue& aVal) | |
| 25 : mType(nsSMILNullType::Singleton()) | |
| 26 { | |
| 27 InitAndCheckPostcondition(aVal.mType); | |
| 28 mType->Assign(*this, aVal); | |
| 29 } | |
| 30 | |
| 31 const nsSMILValue& | |
| 32 nsSMILValue::operator=(const nsSMILValue& aVal) | |
| 33 { | |
| 34 if (&aVal == this) | |
| 35 return *this; | |
| 36 | |
| 37 if (mType != aVal.mType) { | |
| 38 DestroyAndReinit(aVal.mType); | |
| 39 } | |
| 40 | |
| 41 mType->Assign(*this, aVal); | |
| 42 | |
| 43 return *this; | |
| 44 } | |
| 45 | |
| 46 bool | |
| 47 nsSMILValue::operator==(const nsSMILValue& aVal) const | |
| 48 { | |
| 49 if (&aVal == this) | |
| 50 return true; | |
| 51 | |
| 52 return mType == aVal.mType && mType->IsEqual(*this, aVal); | |
| 53 } | |
| 54 | |
| 55 void | |
| 56 nsSMILValue::Swap(nsSMILValue& aOther) | |
| 57 { | |
| 58 nsSMILValue tmp; | |
| 59 memcpy(&tmp, &aOther, sizeof(nsSMILValue)); // tmp = aOther | |
| 60 memcpy(&aOther, this, sizeof(nsSMILValue)); // aOther = this | |
| 61 memcpy(this, &tmp, sizeof(nsSMILValue)); // this = tmp | |
| 62 | |
| 63 // |tmp| is about to die -- we need to clear its mType, so that its | |
| 64 // destructor doesn't muck with the data we just transferred out of it. | |
| 65 tmp.mType = nsSMILNullType::Singleton(); | |
| 66 } | |
| 67 | |
| 68 nsresult | |
| 69 nsSMILValue::Add(const nsSMILValue& aValueToAdd, uint32_t aCount) | |
| 70 { | |
| 71 if (aValueToAdd.mType != mType) { | |
| 72 NS_ERROR("Trying to add incompatible types"); | |
| 73 return NS_ERROR_FAILURE; | |
| 74 } | |
| 75 | |
| 76 return mType->Add(*this, aValueToAdd, aCount); | |
| 77 } | |
| 78 | |
| 79 nsresult | |
| 80 nsSMILValue::SandwichAdd(const nsSMILValue& aValueToAdd) | |
| 81 { | |
| 82 if (aValueToAdd.mType != mType) { | |
| 83 NS_ERROR("Trying to add incompatible types"); | |
| 84 return NS_ERROR_FAILURE; | |
| 85 } | |
| 86 | |
| 87 return mType->SandwichAdd(*this, aValueToAdd); | |
| 88 } | |
| 89 | |
| 90 nsresult | |
| 91 nsSMILValue::ComputeDistance(const nsSMILValue& aTo, double& aDistance) const | |
| 92 { | |
| 93 if (aTo.mType != mType) { | |
| 94 NS_ERROR("Trying to calculate distance between incompatible types"); | |
| 95 return NS_ERROR_FAILURE; | |
| 96 } | |
| 97 | |
| 98 return mType->ComputeDistance(*this, aTo, aDistance); | |
| 99 } | |
| 100 | |
| 101 nsresult | |
| 102 nsSMILValue::Interpolate(const nsSMILValue& aEndVal, | |
| 103 double aUnitDistance, | |
| 104 nsSMILValue& aResult) const | |
| 105 { | |
| 106 if (aEndVal.mType != mType) { | |
| 107 NS_ERROR("Trying to interpolate between incompatible types"); | |
| 108 return NS_ERROR_FAILURE; | |
| 109 } | |
| 110 | |
| 111 if (aResult.mType != mType) { | |
| 112 // Outparam has wrong type | |
| 113 aResult.DestroyAndReinit(mType); | |
| 114 } | |
| 115 | |
| 116 return mType->Interpolate(*this, aEndVal, aUnitDistance, aResult); | |
| 117 } | |
| 118 | |
| 119 //---------------------------------------------------------------------- | |
| 120 // Helper methods | |
| 121 | |
| 122 // Wrappers for nsISMILType::Init & ::Destroy that verify their postconditions | |
| 123 void | |
| 124 nsSMILValue::InitAndCheckPostcondition(const nsISMILType* aNewType) | |
| 125 { | |
| 126 aNewType->Init(*this); | |
| 127 NS_ABORT_IF_FALSE(mType == aNewType, | |
| 128 "Post-condition of Init failed. nsSMILValue is invalid"); | |
| 129 } | |
| 130 | |
| 131 void | |
| 132 nsSMILValue::DestroyAndCheckPostcondition() | |
| 133 { | |
| 134 mType->Destroy(*this); | |
| 135 NS_ABORT_IF_FALSE(IsNull(), "Post-condition of Destroy failed. " | |
| 136 "nsSMILValue not null after destroying"); | |
| 137 } | |
| 138 | |
| 139 void | |
| 140 nsSMILValue::DestroyAndReinit(const nsISMILType* aNewType) | |
| 141 { | |
| 142 DestroyAndCheckPostcondition(); | |
| 143 InitAndCheckPostcondition(aNewType); | |
| 144 } |
